To The Escape Zeppelin!:Hmm. If you started with 100 rats and they had nothing to eat but each other, how long would the last rat last?

THIS.... after a couple of months, unless they were in the hundred of thousands, they can't really reproduce that fast while feeding from each other.

I'd think that unless the stores were full, they'd resort to eating anything that had any food-value/organic... at some point.. well, unless they learn to fish or have birds landing on the deck and they are fast enough to catch these birds.

Unless... there's been several salvage crew that have ventured onto that boat, never to be heard from again and those salvage ships are also adrift now.

dittybopper:Hard thing to find a ship on the ocean that doesn't radiate some sort of a signal or even a heat signature (it will be at ambient temperature most of the time).

About the only hope to find it, other than just stumbling upon it it, is a radar search. Enough aircraft to search for it would be expensive, and really the only other option is a radar satellite. Take a look at snap-shots of the North Atlantic in subsequent passes, and subtract out any large ship-like targets that move faster than a couple of knots, and you'll be left with just a few potential candidates which you can then investigate by aircraft or nearby naval assets.